The Roku link code may also expire at times. In case if you require a new Roku Activation Code, you can procure it by clicking the help button and choose the get a new code option. You need to use the code immediately before it gets expired. At times even after entering the activation code the screen may get the freeze. In such a case, you can repeat the Roku activation procedures again. Further more information please visit @ go.roku.com/express and also contact @ +1-866-990-7120.